1. An undercarriage, comprising:

the number of the main beams (10) is two, and the two main beams (10) are fixedly connected in a cross manner;

a base (20), the base (20) being disposed below the main beam (10), the main beam (10) being supported on a support surface by the base (20);

regulating part (30), regulating part (30) set up girder (10) with between base (20), base (20) pass through regulating part (30) with girder (10) are connected, regulating part (30) are used for changing girder (10) with the interval of base (20), regulating part (30) are changing girder (10) with the interval in-process of base (20), adjust the levelness of girder (10).

2. The chassis of claim 1,

the girder (10) both ends have connecting plate (11), regulating part (30) are a plurality of, and are a plurality of regulating part (30) with connecting plate (11) one-to-one, regulating part (30) are connected on connecting plate (11).

3. The chassis of claim 2,

the adjusting piece (30) is a bolt, a screw hole matched with the bolt is formed in the connecting plate (11), the bolt penetrates through the screw hole and is in threaded fit, one end of the adjusting piece (30) is fixedly connected with the base (20), and the bolt enables the base (20) and the main beam (10) to be far away from or close to each other through rotation.

4. The chassis of claim 3,

a reinforcing block (12) is arranged on the connecting plate (11), the reinforcing block (12) is fixedly connected with the connecting plate (11), a screw hole is formed in the reinforcing block (12), and the screw hole in the reinforcing block (12) is the same as the screw hole in the connecting plate (11);

the bolt simultaneously runs through the screw hole of reinforcing block (12) and the screw hole of connecting plate (11), the bolt simultaneously with reinforcing block (12), connecting plate (11) screw-thread fit.

5. The chassis of claim 1,

the main beam (10) comprises a plurality of mounting seats (13) for connecting standard knots.

6. The chassis of claim 5,

the mounting seat (13) is provided with a plurality of mounting holes which are distributed on the mounting seat (13) at intervals so as to be matched with standard knots of different specifications.

7. The undercarriage of claim 1 wherein the main beam (10) comprises:

a first main beam (14);

a foldable second main beam (15), wherein the second main beam (15) comprises a connecting part (151) which is fixedly connected with the first main beam (14) in a crisscross manner;

a connection assembly (16), the connection assembly (16) detachably connecting the first main beam (14) and the second main beam (15).

8. The chassis of claim 7,

the second main beam (15) further comprises a first movable portion (152) and a second movable portion (153), the first movable portion (152) and the second movable portion (153) are hinged to two ends of the connecting portion (151) respectively, and the first movable portion (152) and the second movable portion (153) can be folded relative to the connecting portion (151).

9. The chassis of claim 8, further comprising:

a fixing lug (17), the fixing lug (17) being disposed on the main beam (10), the fixing lug (17) being used to fix the first movable portion (152) and the second movable portion (153) when the second main beam (15) is folded.

10. A crane, comprising a base frame as claimed in any one of claims 1 to 9.

Background

The traditional tower crane underframe generally comprises a whole beam, a half beam, two standard sections, a stay bar, a pull rod and the like. The whole beam and the half beam form a supporting plane at the bottom, and the two standard joints are pulled by the diagonal brace. The underframe with the structure has large volume, can not be folded, is relatively troublesome to transport, and can not be leveled, so that the subsequent adjustment process is complicated, and the assembly efficiency is influenced.

Disclosure of Invention

The invention aims to solve the problem that the bottom frame cannot be leveled in the prior art, and provides the bottom frame which can realize leveling by itself when the bottom surface foundation is uneven, so that the assembly efficiency is improved.

In order to achieve the above object, an aspect of the present invention provides a chassis including: the number of the main beams is two, and the two main beams are fixedly connected in a crossed manner; the base is arranged below the main beam, and the main beam is supported on a supporting surface through the base; the adjusting piece is arranged between the main beam and the base, the base is connected with the main beam through the adjusting piece, the adjusting piece is used for changing the distance between the main beam and the base, and the adjusting piece adjusts the levelness of the main beam in the process of changing the distance between the main beam and the base.

Furthermore, the two ends of the main beam are provided with a plurality of connecting plates, the adjusting pieces correspond to the connecting plates one by one, and the adjusting pieces are connected to the connecting plates.

Further, the adjusting piece is a bolt, a screw hole matched with the bolt is formed in the connecting plate, the bolt penetrates through the screw hole and is in threaded fit with the screw hole, one end of the adjusting piece is fixedly connected with the base, and the bolt enables the base and the main beam to be far away from or close to each other through rotation.

Furthermore, a reinforcing block is arranged on the connecting plate and fixedly connected with the connecting plate, a screw hole is formed in the reinforcing block, and the screw hole in the reinforcing block is the same as the screw hole in the connecting plate; the bolt simultaneously runs through the screw of reinforcing block and the screw of connecting plate, the bolt simultaneously with reinforcing block, connecting plate screw-thread fit.

Further, the main beam includes a plurality of mounts for connecting standard knots.

Furthermore, a plurality of mounting holes are formed in the mounting seat, and the mounting holes are distributed on the mounting seat at intervals to be matched with standard knots of different specifications.

Further, the main beam includes: a first main beam; the foldable second main beam comprises a connecting part which is crossly and fixedly connected with the first main beam; a connection assembly detachably connecting the first and second main beams.

Further, the second main beam further comprises a first movable portion and a second movable portion, the first movable portion and the second movable portion are hinged to two ends of the connecting portion respectively, and the first movable portion and the second movable portion can be opposite to the connecting portion and can be folded.

Further, the chassis further includes: the fixed lug is arranged on the main beam and used for fixing the first movable part and the second movable part when the second main beam is folded.

According to another aspect of the invention, the crane comprises the underframe.

According to the invention, the base frame is provided with the base and the adjusting piece, the levelness of the main beam can be adjusted through the adjusting piece, and when the supporting surface is uneven, the leveling can be realized by adjusting the adjusting piece of the base frame, so that the base frame is prevented from inclining.

The crane and the underframe have the same advantages compared with the prior art, and the description is omitted.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

FIG. 1 is a schematic structural diagram of a chassis according to an embodiment of the present invention;

FIG. 2 is a schematic view of the chassis of an embodiment of the present invention in an unfolded state;

FIG. 3 is a schematic view of the undercarriage of an embodiment of the present invention in a folded state;

legend: 10. a main beam; 11. a connecting plate; 12. a reinforcing block; 13. a mounting seat; 14. a first main beam; 15. a second main beam; 151. a connecting portion; 152. a first movable portion; 153. a second movable portion; 16. a connecting assembly; 17. fixing the ear; 20. a base; 30. an adjusting member.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

As shown in fig. 1 to 3, the invention discloses an underframe, which comprises two main beams 10, a base 20 and an adjusting piece 30, wherein the two main beams 10 are fixedly connected in a crisscross manner; the base 20 is arranged below the main beam 10, and the main beam 10 is supported on a supporting surface through the base 20; the adjusting part 30 is arranged between the main beam 10 and the base 20, the base 20 is connected with the main beam 10 through the adjusting part 30, the adjusting part 30 is used for changing the distance between the main beam 10 and the base 20, and the adjusting part 30 adjusts the levelness of the main beam 10 in the process of changing the distance between the main beam 10 and the base 20. According to the invention, the base frame is provided with the base and the adjusting piece, the levelness of the main beam can be adjusted through the adjusting piece, and when the supporting surface is uneven, the leveling can be realized by adjusting the adjusting piece of the base frame, so that the base frame is prevented from inclining.

Furthermore, the main beam 10 has a connecting plate 11 at both ends, and adjusting part 30 is a plurality of, and a plurality of adjusting parts 30 and connecting plate 11 one-to-one correspond, and adjusting part 30 is connected on connecting plate 11. The adjusting pieces are arranged on the connecting plates at the two ends of the main beam, so that the heights of the two ends of the main beam can be adjusted respectively, and the main beam can be conveniently leveled.

Preferably, the adjusting member 30 is a bolt, a screw hole matched with the bolt is formed in the connecting plate 11, the bolt is inserted into the screw hole and is in threaded fit, one end of the adjusting member 30 is fixedly connected with the base 20, and the bolt enables the base 20 and the main beam 10 to be far away from or close to each other through rotation. By adopting the matching of the bolts and the screw holes on the connecting plate, the height of the main beam can be adjusted by rotating the bolts, thereby realizing leveling.

In order to ensure the reliability of connection, a reinforcing block 12 is arranged on the connecting plate 11, the reinforcing block 12 is welded on the connecting plate 11, a screw hole is arranged on the reinforcing block 12, and the screw hole on the reinforcing block 12 is the same as the screw hole of the connecting plate 11; the bolt simultaneously runs through the screw of reinforcement piece 12 and the screw of connecting plate 11, and the bolt simultaneously with reinforcement piece 12, connecting plate 11 screw-thread fit. Through setting up the reinforcement piece, make the screw of reinforcement piece and screw rod cooperate, can make to connect more reliably, the adjustment process is more stable.

In order to facilitate adjustment, a radial hole can be formed in the screw rod, and a handle can be arranged in the radial hole in a penetrating mode during rotation, so that the screw rod is convenient to rotate.

It should be noted that, the connecting piece can also adopt the cylinder except the bolt, through the flexible levelness of adjusting the girder of cylinder.

The main beam 10 includes a plurality of mounts 13 for attaching standard knots. The installation seat 13 can be used for connecting standards of different specifications such as tower cranes. Preferably, a plurality of mounting holes are arranged on the mounting base 13, and the plurality of mounting holes are distributed on the mounting base 13 at intervals so as to match with standard knots with different specifications.

In the embodiment shown in fig. 1, the main beam 10 includes a first main beam 14, a foldable second main beam 15 and a connecting assembly 16, the second main beam 15 includes a connecting portion 151 crosswise fixed to the first main beam 14; attachment assembly 16 removably attaches first main beam 14 and second main beam 15. By arranging the second main beam 15 to be foldable, the second main beam 15 can be folded when not in operation, so that the size of the underframe is reduced, and transportation is facilitated. In order to reduce the volume of the first main beam 14 and the second main beam 15 as much as possible when the first main beam 14 and the second main beam 15 are folded, a connecting portion 151 located in the middle of the second main beam 15 and the first main beam 14 are fixedly connected in a crossed manner to facilitate the folding of the second main beam 15, wherein the length of the connecting portion 151 can be set to be slightly less than the sum of the two times of the width of the second main beam 15 and the width of the first main beam 14, so that when the second main beam 15 is folded, foldable portions at two ends of the second main beam 15 can be parallel to the length direction of the first main beam 14, and the size of the underframe in the width direction is reduced as much as possible. The first main beam 14 and the second main beam 15 are i-beams with i-shaped cross sections. Of course, the first main beam 14 and the second main beam 15 may be box beams having a polygonal cross section, and the first main beam 14 and the second main beam 15 may be truss structure beams. In short, it is sufficient if the strength, rigidity, and space requirements are satisfied. The connecting portion 151 may have various configurations, and may have an integral configuration or a separate configuration.

Second main beam 15 further includes a first movable portion 152 and a second movable portion 153, first movable portion 152 and second movable portion 153 are respectively hinged to two ends of connecting portion 151, and first movable portion 152 and second movable portion 153 can be folded with respect to connecting portion 151. The chassis folding or unfolding is performed by rotating the first and second movable portions 152 and 153. One end of the connecting portion 151 and the first movable portion 152 are hinged at a first hinge point, and the other end of the connecting portion 151 departing from the first movable portion 152 and the second movable portion 153 are hinged at a second hinge point. When the stand needs to be opened, the first movable portion 152 rotates centering on the first hinge point; the second movable portion 153 rotates around the second hinge point until the first movable portion 152, the second movable portion 153 and the connecting portion 151 are connected to form a straight beam extending along the length of the connecting portion 151, and then the first movable portion 152 and the second movable portion 153 are defined by the connecting assembly 16 and the position of the first main beam 14, wherein both ends of the connecting assembly 16 are respectively hinged to the first main beam 14 and the second main beam 15.

The base frame further comprises a fixing lug 17, the fixing lug 17 being arranged on the main beam 10, the fixing lug 17 being used for fixing the first movable portion 152 and the second movable portion 153 when the second main beam 15 is folded. The end portions of the first main beam 14 and the second main beam 15 are each provided with two fixing lugs 17 on both sides in the width direction of the main beam. Thus, through the fixing lug 17, when the second main beam 15 is folded, the second main beam 15 and the first main beam 14 are fixed, and the first main beam 14 and the connecting assembly 16 are fixed; alternatively, second main beam 15 is fixed to first main beam 14, and connection assembly 16 is fixed to second main beam 15.

The chassis includes a plurality of weights. Through setting up the ballast into the polylith, the focus of the object of adjustment chassis and bearing above the chassis through arranging of adjustment ballast that can be convenient, preferably, the ballast arranges the form and is the four sides ballast, arranges two basic ballasts respectively at first on both sides, then stacks the standard ballast on four sides again, all fixes a position through the round pin axle between every ballast. Therefore, the installation height and the installation center of gravity of the ballast weight are reduced, the safety is higher, and the arrangement mode is more attractive.

According to another embodiment of the invention, the crane comprises the underframe.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications may be made to the technical solution of the invention, and in order to avoid unnecessary repetition, various possible combinations of the invention will not be described further. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.